Project description:Gut microbiota dysbiosis characterizes systemic metabolic alteration, yet its causality is debated. To address this issue, we transplanted antibiotic-free conventional wild-type mice with either dysbiotic (“obese”) or eubiotic (“lean”) gut microbiota and fed them either a NC or a 72%HFD. We report that, on NC, obese gut microbiota transplantation reduces hepatic gluconeogenesis with decreased hepatic PEPCK activity, compared to non-transplanted mice. Of note, this phenotype is blunted in conventional NOD2KO mice. By contrast, lean microbiota transplantation did not affect hepatic gluconeogenesis. In addition, obese microbiota transplantation changed both gut microbiota and microbiome of recipient mice. Interestingly, hepatic gluconeogenesis, PEPCK and G6Pase activity were reduced even once mice transplanted with the obese gut microbiota were fed a 72%HFD, together with reduced fed glycaemia and adiposity compared to non-transplanted mice. Notably, changes in gut microbiota and microbiome induced by the transplantation were still detectable on 72%HFD. Finally, we report that obese gut microbiota transplantation may impact on hepatic metabolism and even prevent HFD-increased hepatic gluconeogenesis. Our findings may provide a new vision of gut microbiota dysbiosis, useful for a better understanding of the aetiology of metabolic diseases. all livers are from NC-fed mice only.

2017-03-16 | GSE81318 | GEO

Gut microbiota in pediatric patients with CNS tumors

Project description:Brain and central nervous system (CNS) tumors are the leading cause of cancer-related deaths in both adults and children, particularly affecting those aged 0–14 years. Efforts to develop targeted therapies have largely been unsuccessful, with limited improvement in survival rates. This underscores the urgent need for more effective treatments. Recent research highlights the importance of the gut microbiota and its collective genomes, known as the microbiome, in maintaining overall health. The microbiome helps prevent infections and regulates immune responses both locally and throughout the body. There is a strong connection between the gastrointestinal (GI) system and the CNS, as the CNS plays a crucial role in controlling the GI tract’s function and balance. The relationship between the gut microbiota and the brain, referred to as the microbiota-gut-brain axis, is a complex interaction that may influence CNS cancer development and treatment outcomes. In this study, researchers examined the gut microbiota composition in a group of pediatric cancer patients, focusing on those with CNS tumors.

2025-06-04 | GSE278463 | GEO

gut metagenome

Project description:Lizard gut microbiota Targeted loci environmental

| PRJNA312520 | ENA